How Much Boost Is Too Much Boost?

[Italiazr1]

ok guys ive heard so many different theories on how much boost to run

my car is internally modified forgies, rods, studs rb20

and everyone tells me different things about what boost level's are safe.....

i know a few guys runnin like 22 - 24psi on pump fuel? is this safe?

im only running 19psi cause my mechanic said that anything above this sort of level can be

dangerous on pump fuel

i mean who doesnt wanna run more boost? but how much is too much for everyday thrashing

id even like to know on an internally standard rb20 rb25 ect ect

[NYTSKY]

I wouldnt go over 20psi on pump fuel. A batch of slightly poor quality fuel will see a premature end to your engine.

E85 on the other hand is a different matter

[WARLORD]

when it makes a loud bang noise thats when you have hit the toooo much button..lol

im running about 20-21 psi on a non stock engine

[Italiazr1]

yeah thats what my mech said and ill probably stick to that just so many other guys run more

any one else have any views?

whats E85? race fuel?

[Italiazr1]

yeah already done the big bang theory on my last engine hahaha

[LotusGTR]

Wouldn't it depend on the overall tune? i.e. spark advance and fueling at high boost? I believe I'm running 24psi and never had any issues with detonation at any amb /engine temp. It's seriously over fuelled at high boost. Foot down = cloud o fuel out the back.

[Italiazr1]

ok maybe i should have another tuner look at mine just for another oppinion?

only thing is ive got a wolf 3d v5 and everyone tells me that not everyone can tune them right??

anyone know someone that can?

anyway thats why i opened up this topic i want oppinions from everyone

[Piggaz]

Have run up to 1.8 Bar on shells V power racing when it was available. Twin GT RS, Tomei stroker, 9.0:1 compression ratio. No problem.

[Italiazr1]

ok

how much is a bar of boost in psi?

[Ryanrb25]

An rb20 i helped build and tune was running 25psi now down to 22psi on pump fuel and has done well over 550 dyno runs. 310rwkw.

[Ryanrb25]

1 bar = 14.5 psi

[Italiazr1]

i think im going to get a race fuel tune done and bump it up a couple of notches

i really wanna see what i can get out of it just for a couple of runs down the strip.

[Italiazr1]

do most of you guys run a high and low boost setting? with an electronic boost controller?

i have a turbo smart line tap boost controller atm but thinkin bout getting an ebc

[Piggaz]

^^^

I run my car all the time at 1.65/1.7 Bar everytime i drive it. Dont want to go flat out.... dont be so heavy with your right foot!

[joeyjoejoejuniorshabadoo]

yes i run an ebc... 1bar daily driver, 1.4 high boost

cant go wrong

[MBS206]

^^^

I run my car all the time at 1.65/1.7 Bar everytime i drive it. Dont want to go flat out.... dont be so heavy with your right foot!

And when you need a shit load of grunt to come up, you just have to squeeze... Not go fumbling for some stupid switch/button...

My R33 used to have a dual stage, 6PSi, and 10PSi...

It bugged me if I needed power in a quick instance to duck through a gap, as you had to fumble for the switch, by then, the gap was gone.

In the end I always drove on 10PSi, after that I swapped to a boost controller that only had one boost setting...

[bradsm87]

It totally depends on the efficiency range of the turbo and things like the thickness of the head gasket that effect compression of the engine.